c#实现文件压缩与解压功能的示例代码

压缩

private void skinbutton1_click(object sender, eventargs e)
      {
          filesuploadfor.zipdirectory(foldertozip.text,zipedfilename.text);
          filesuploadfor.displaylistboxmsg("压缩完成");
      }

zipdirectory

压缩用的是库函数

       ///       /// 压缩文件夹
     ///       /// 需要压缩的文件夹
     /// 压缩后的zip完整文件名
      public static void zipdirectory(string foldertozip, string zipedfilename)
      {
          zipdirectory(foldertozip, zipedfilename, string.empty, true, string.empty, string.empty, true);
      }

      ///        /// 压缩文件夹
      ///        /// 需要压缩的文件夹
      /// 压缩后的zip完整文件名（如d:\test.zip）
      /// 如果文件夹下有子文件夹，是否递归压缩
      /// 解压时需要提供的密码
      /// 文件过滤正则表达式
      /// 文件夹过滤正则表达式
      /// 是否压缩文件中的空文件夹

      public static void zipdirectory(string foldertozip, string zipedfilename, string password, bool isrecurse, string fileregexfilter, string directoryregexfilter, bool iscreateemptydirectories)
      {
          fastzip fastzip = new fastzip();
          fastzip.createemptydirectories = iscreateemptydirectories;
          fastzip.password = password;
          fastzip.createzip(zipedfilename, foldertozip, isrecurse, fileregexfilter, directoryregexfilter);
      }

解压缩

  private void skinbutton2_click(object sender, eventargs e)
      {
          filesuploadfor.unzip(zipedfilename.text,"");
           filesuploadfor.displaylistboxmsg("解压缩完成");
      }

unzip

解压用的是库函数

        ///   
      /// 功能：解压zip格式的文件。  
      ///   
      /// 压缩文件路径  
      /// 解压文件存放路径,为空时默认与压缩文件同一级目录下，跟压缩文件同名的文件夹  
      /// 解压是否成功  
      public void unzip(string zipfilepath, string unzipdir)
      {
          if (zipfilepath == string.empty)
          {
              throw new exception("压缩文件不能为空！");
          }
          if (!file.exists(zipfilepath))
          {
              throw new filenotfoundexception("压缩文件不存在！");
          }
          //解压文件夹为空时默认与压缩文件同一级目录下，跟压缩文件同名的文件夹  
          if (unzipdir == string.empty)
              unzipdir = zipfilepath.replace(path.getfilename(zipfilepath), path.getfilenamewithoutextension(zipfilepath));
          if (!unzipdir.endswith("/"))
              unzipdir += "/";
          if (!directory.exists(unzipdir))
              directory.createdirectory(unzipdir);

          using (var s = new zipinputstream(file.openread(zipfilepath)))
          {

              zipentry theentry;
              while ((theentry = s.getnextentry()) != null)
              {
                  string directoryname = path.getdirectoryname(theentry.name);
                  string filename = path.getfilename(theentry.name);
                  if (!string.isnullorempty(directoryname))
                  {
                      directory.createdirectory(unzipdir + directoryname);
                  }
                  if (directoryname != null && !directoryname.endswith("/"))
                  {
                  }
                  if (filename != string.empty)
                  {
                      using (filestream streamwriter = file.create(unzipdir + theentry.name))
                      {

                          int size;
                          byte[] data = new byte[2048];
                          while (true)
                          {
                              size = s.read(data, 0, data.length);
                              if (size > 0)
                              {
                                  streamwriter.write(data, 0, size);
                              }
                              else
                              {
                                  break;
                              }
                          }
                      }
                  }
              }
          }
      }